ARM: zynq: Switch to single zynq configurations

There are a lot of zynq configurations which can be merged together and use
only one for all. The similar change has been done for ZynqMP by commit
be1b6c32d940 ("arm64: zynqmp: Use zynqmp_virt platform")

Build SPL with u-boot.img for zc706 like this.
export DEVICE_TREE=zynq-zc706 && make xilinx_zynq_virt_defconfig && make -j8
u-boot.img is generic for all boards.

Tested on Zybo, zc702, zc706, zc770-xm011-x16, cc108 and microzed.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 55943bb..8903358 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -320,13 +320,13 @@
     BUILDMAN: "^qemu-x86_64$"
   <<: *buildman_and_testpy_dfn
 
-zynq_zc702 test.py:
+xilinx_zynq_virt test.py:
   tags: [ 'all' ]
   variables:
-    TEST_PY_BD: "zynq_zc702"
+    TEST_PY_BD: "xilinx_zynq_virt"
     TEST_PY_TEST_SPEC: "not sleep"
     TEST_PY_ID: "--id qemu"
-    BUILDMAN: "^zynq_zc702$"
+    BUILDMAN: "^xilinx_zynq_virt$"
   <<: *buildman_and_testpy_dfn
 
 xilinx_versal_virt test.py: